Cognomen Belii (Belii 
, Белии 
) , throughout the world, is a rare family name. The family name Belii is characteristic of Moldova, where it is quite a rare surname, Lithuania, where it is a rare surname, and Romania. Measured by absolute frequency, the name is most common in Eastern Europe, particularly Moldova, Russia, and Romania. Much less frequently, Belii is the forename as well as the last name.